1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "extensions/common/features/json_feature_provider_source.h"
6
7#include "base/json/json_reader.h"
8#include "base/logging.h"
9#include "ui/base/resource/resource_bundle.h"
10
11namespace extensions {
12
13JSONFeatureProviderSource::JSONFeatureProviderSource(const std::string& name)
14    : name_(name) {
15}
16
17JSONFeatureProviderSource::~JSONFeatureProviderSource() {
18}
19
20void JSONFeatureProviderSource::LoadJSON(int resource_id) {
21  const std::string& features_file = ResourceBundle::GetSharedInstance()
22                                         .GetRawDataResource(resource_id)
23                                         .as_string();
24  int error_code = 0;
25  std::string error_message;
26  scoped_ptr<base::Value> value(base::JSONReader::ReadAndReturnError(
27      features_file, base::JSON_PARSE_RFC, &error_code, &error_message));
28  DCHECK(value) << "Could not load features: " << name_ << " " << error_message;
29
30  scoped_ptr<base::DictionaryValue> value_as_dict;
31  if (value) {
32    CHECK(value->IsType(base::Value::TYPE_DICTIONARY)) << name_;
33    value_as_dict.reset(static_cast<base::DictionaryValue*>(value.release()));
34  } else {
35    // There was some error loading the features file.
36    // http://crbug.com/176381
37    value_as_dict.reset(new base::DictionaryValue());
38  }
39
40  // Ensure there are no key collisions.
41  for (base::DictionaryValue::Iterator iter(*value_as_dict); !iter.IsAtEnd();
42       iter.Advance()) {
43    if (dictionary_.GetWithoutPathExpansion(iter.key(), NULL))
44      LOG(FATAL) << "Key " << iter.key() << " is defined in " << name_
45                 << " JSON feature files more than once.";
46  }
47
48  // Merge.
49  dictionary_.MergeDictionary(value_as_dict.get());
50}
51
52}  // namespace extensions
53